v3.10.0.1

SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Summary of the categories of property and equipment |  |
Property, Plant and Equipment, net of accumulated depreciation | $ 324,669 | $ 346,507
Deferred Revenue |  |
Current - accrued compensation and other current liabilities | 24,625 | 17,519
Long-term - other long term liabilities | $ 7,888 | $ 13,000

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